LLVM: llvm::InstructionSelector Class Reference (original) (raw)

#include "[llvm/CodeGen/GlobalISel/InstructionSelector.h](InstructionSelector%5F8h%5Fsource.html)"

Inheritance diagram for llvm::InstructionSelector:

Public Member Functions
~InstructionSelector () override
virtual bool select (MachineInstr &I)=0
Select the (possibly generic) instruction I to only use target-specific opcodes.
Public Member Functions inherited from llvm::GIMatchTableExecutor
virtual ~GIMatchTableExecutor ()=default
virtual void setupGeneratedPerFunctionState (MachineFunction &MF)=0
virtual void setupMF (MachineFunction &mf, GISelValueTracking *vt, CodeGenCoverage *covinfo=nullptr, ProfileSummaryInfo *psi=nullptr, BlockFrequencyInfo *bfi=nullptr)
Setup per-MF executor state.
Public Attributes
MachineOptimizationRemarkEmitter * MORE = nullptr
GISelObserverWrapper * AllObservers = nullptr
Note: InstructionSelect does not track changed instructions.
Public Attributes inherited from llvm::GIMatchTableExecutor
CodeGenCoverage * CoverageInfo = nullptr
GISelValueTracking * VT = nullptr
MachineFunction * MF = nullptr
ProfileSummaryInfo * PSI = nullptr
BlockFrequencyInfo * BFI = nullptr
MachineBasicBlock * CurMBB = nullptr
Additional Inherited Members
Static Public Member Functions inherited from llvm::GIMatchTableExecutor
static LLVM_ATTRIBUTE_ALWAYS_INLINE uint64_t fastDecodeULEB128 (const uint8_t *LLVM_ATTRIBUTE_RESTRICT MatchTable, uint64_t &CurrentIdx)
Protected Types inherited from llvm::GIMatchTableExecutor
using ComplexRendererFns
using RecordedMIVector = SmallVector<MachineInstr *, 4>
using NewMIVector = SmallVector<MachineInstrBuilder, 4>
Protected Member Functions inherited from llvm::GIMatchTableExecutor
bool shouldOptForSize (const MachineFunction *MF) const
LLVM_ABI GIMatchTableExecutor ()
template<class TgtExecutor, class PredicateBitset, class ComplexMatcherMemFn, class CustomRendererFn>
bool executeMatchTable (TgtExecutor &Exec, MatcherState &State, const ExecInfoTy< PredicateBitset, ComplexMatcherMemFn, CustomRendererFn > &ExecInfo, MachineIRBuilder &Builder, const uint8_t *MatchTable, const TargetInstrInfo &TII, MachineRegisterInfo &MRI, const TargetRegisterInfo &TRI, const RegisterBankInfo &RBI, const PredicateBitset &AvailableFeatures, CodeGenCoverage *CoverageInfo) const
Execute a given matcher table and return true if the match was successful and false otherwise.
virtual const uint8_t * getMatchTable () const
virtual bool testImmPredicate_I64 (unsigned, int64_t) const
virtual bool testImmPredicate_APInt (unsigned, const APInt &) const
virtual bool testImmPredicate_APFloat (unsigned, const APFloat &) const
virtual bool testMIPredicate_MI (unsigned, const MachineInstr &, const MatcherState &State) const
virtual bool testMOPredicate_MO (unsigned, const MachineOperand &, const MatcherState &State) const
virtual bool testSimplePredicate (unsigned) const
virtual bool runCustomAction (unsigned, const MatcherState &State, NewMIVector &OutMIs) const
LLVM_ABI bool isOperandImmEqual (const MachineOperand &MO, int64_t Value, const MachineRegisterInfo &MRI, bool Splat=false) const
LLVM_ABI bool isBaseWithConstantOffset (const MachineOperand &Root, const MachineRegisterInfo &MRI) const
Return true if the specified operand is a G_PTR_ADD with a G_CONSTANT on the right-hand side.
LLVM_ABI bool isObviouslySafeToFold (MachineInstr &MI, MachineInstr &IntoMI) const
Return true if MI can obviously be folded into IntoMI.
Static Protected Member Functions inherited from llvm::GIMatchTableExecutor
template
static Ty readBytesAs (const uint8_t *MatchTable)
static ArrayRef< MachineOperand > getRemainingOperands (const MachineInstr &MI, unsigned FirstVarOp)

Detailed Description

Definition at line 22 of file InstructionSelector.h.

Constructor & Destructor Documentation

llvm::InstructionSelector::~InstructionSelector ( ) overridedefault

Member Function Documentation

◆ select()

Select the (possibly generic) instruction I to only use target-specific opcodes.

It is OK to insert multiple instructions, but they cannot be generic pre-isel instructions.

Returns

whether selection succeeded.

Precondition

I.getParent() && I.getParent()->getParent()

Postcondition

if returns true: for I in all mutated/inserted instructions: !isPreISelGenericOpcode(I.getOpcode())

Implemented in llvm::AMDGPUInstructionSelector.

References I.

Member Data Documentation

◆ AllObservers

◆ MORE

The documentation for this class was generated from the following files: